影片讲述了一个男人为了替在抢劫案中惨死的女友和变成植物人的老爸报仇，潜伏八年，甚至睡了抢劫团伙司机的孩子他妈，只为等他出狱，威胁他，顺藤摸瓜找到躲藏起来的真凶们，一个一个复仇。

A Polish boy runs away from his unkind foster mother in Edinburgh and finds a new home in a lakeside village for orphans of all nations, after encountering trouble through his innocent implication in a robbery.

With a sparkling script by Leslie Charteris, creator of "The Saint" - the latest crime wave has Scotland Yard baffled. Commissioner Hope (Sir Guy Standing) sends two of his officers (Billy Bevan and Charles McNaughton) to the Midnight Club to check up on a couple of shady characters - Colin Grant (Clive Brook) and Arthur Bradley (Allan Mowbray) and a girl, Iris Witney (Helen Vinson). There have been a number of jewel robberies around town recently, but, unknown to the police, these three have the perfect alibis!!! They have found "doubles", and while they are out committing the robberies, their doubles spend the night at the club, confusing the two officers who are on their tail.